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U1AFS1500-FGG256 Folha de dados(PDF) 9 Page - Actel Corporation |
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U1AFS1500-FGG256 Folha de dados(HTML) 9 Page - Actel Corporation |
9 / 17 page Actel Fusion Mixed-Signal FPGAs for the MicroBlade AdvancedMC Solution Pr el iminar y v0 .4 1-5 Unprecedented Integration Integrated Analog Blocks and Analog I/Os Fusion devices offer robust and flexible analog mixed-signal capability in addition to the high- performance flash FPGA fabric and flash memory block. The many built-in analog peripherals include a configurable 32:1 input analog MUX, up to 10 independent MOSFET gate driver outputs, and a configurable ADC. The ADC supports 8-, 10-, and 12-bit modes of operation with a cumulative sample rate up to 600 k samples per second (ksps), differential nonlinearity (DNL) < 1.0 LSB, and Total Unadjusted Error (TUE) of 0.72 LSB in 10-bit mode. The TUE is used for characterization of the conversion error and includes errors from all sources, such as offset and linearity. Internal bandgap circuitry offers 1% voltage reference accuracy with the flexibility of utilizing an external reference voltage. The ADC channel sampling sequence and sampling rate are programmable and implemented in the FPGA logic using Designer and Libero IDE software tool support. Two channels of the 32-channel ADCMUX are dedicated. Channel 0 is connected internally to VCC and can be used to monitor core power supply. Channel 31 is connected to an internal temperature diode which can be used to monitor device temperature. The 30 remaining channels can be connected to external analog signals. The exact number of I/Os available for external connection signals is device-dependent (refer to the "MicroBlade Fusion Solutions" table on page I for details). With Fusion, Actel also introduces the Analog Quad I/O structure (Figure 1-1 on page 1-6). Each quad consists of three analog inputs and one gate driver. Each quad can be configured in various built-in circuit combinations, such as three prescaler circuits, three digital input circuits, a current monitor circuit, or a temperature monitor circuit. Each prescaler has multiple scaling factors programmed by FPGA signals to support a large range of analog inputs with positive or negative polarity. When the current monitor circuit is selected, two adjacent analog inputs measure the voltage drop across a small external sense resistor. Built-in operational amplifiers amplify small voltage signals (2 mV sensitivity) for accurate current measurement. One analog input in each quad can be connected to an external temperature monitor diode and achieves detection accuracy of ±3ºC. In addition to the external temperature monitor diode(s), a Fusion device can monitor an internal temperature diode using dedicated channel 31 of the ADCMUX. Figure 1-1 on page 1-6 illustrates a typical use of the Analog Quad I/O structure. The Analog Quad shown is configured to monitor and control an external power supply. The AV pad measures the source of the power supply. The AC pad measures the voltage drop across an external sense resistor |
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Descrição semelhante - U1AFS1500-FGG256 |
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